A curing agent for epoxy resins which comprises cyclohexanetricarboxylic acid anhydride (A) comprising trans,trans-1,2,4-cyclohexanetricarboxylic acid 1,2-anhydride expressed by formula (1) and aliphatic dicarboxylic acid anhydride (B) and an epoxy resin composition which comprises the curing agent and an epoxy resin are provided. The curing agent of the present invention can be handled easily since the curing agent is liquid at the ordinary temperature, exhibits an excellent curing property without addition of a curing accelerator and provides a cured product of an epoxy resin exhibiting excellent transmission of light and heat stability. The epoxy resin composition can be advantageously used for coating materials, adhesives, molded products, resins for encapsulating photo-semiconductors and coating fluids for protective films of color filters constituting liquid crystal display devices (LCD), solid state imaging devices (CCD) and electroluminescence (EL) devices.
本发明提供了一种环氧
树脂固化剂,其包括环己三
甲酸酐(A),包括公式(1)所表示的反式,反式-1,2,4-环己三
甲酸1,2-酐和脂肪族二
羧酸酐(B),以及一种环氧
树脂组合物,其中包括固化剂和环氧
树脂。本发明的固化剂易于处理,因为固化剂在常温下为液体,无需添加固化
促进剂即可表现出优异的固化性能,并提供具有优异光传输和热稳定性的环氧
树脂固化产品。该环氧
树脂组合物可优势地用于涂料材料、粘合剂、成型产品、用于封装光半导体的
树脂以及液晶显示器(LCD)、固态成像器件(CCD)和电致发光(EL)器件的彩色滤光片保护膜的涂层液。